INTERNATIONAL STANDARD IEC 62873-3-1 Edition 1.0 2016-09 Residual current operated circuit-breakers for household and similar use Part 3-1: Particular requirements for RCDs with screwless-type terminals for external copper conductors INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.120.50 ISBN 978-2-8322-3613-0 Warning! Make sure that you obtained this publication from an authorized distributor. Registered trademark of the International Electrotechnical Commission
2 IEC 62873-3-1:2016 IEC 2016 CONTENTS FOREWORD... 3 INTRODUCTION... 5 1 Scope... 6 2 Normative references... 6 3 Terms and definitions... 6 4 Classification... 7 5 Characteristics of RCDs... 7 6 Marking and other product information... 7 7 Standard conditions for operation in service and for installation... 7 8 Requirements for construction and operation... 7 8.1 General... 7 8.2 Connection or disconnection of conductors... 8 8.3 Dimensions of connectable conductors... 8 8.4 Connectable cross-sectional areas... 8 8.5 Insertion and disconnection of conductors... 9 8.6 Design and construction of terminals... 9 8.7 Resistance to ageing... 9 9 Tests... 9 9.1 General... 9 9.2 Test of reliability of screwless terminals... 9 9.2.1 Reliability of screwless system... 9 9.2.2 Test of reliability of connection... 10 9.3 Tests of reliability of terminals for external conductors... 10 9.3.1 Mechanical strength... 10 9.3.2 Cycling test... 11 Bibliography... 14 Figure 1 Connecting samples... 11 Figure 2 Examples of screwless-type terminals... 13 Table 1 Connectable conductors... 8 Table 2 Cross-sections of copper conductors connectable to screwless-type terminals... 9 Table 3 Pull forces... 10
IEC 62873-3-1:2016 IEC 2016 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION RESIDUAL CURRENT OPERATED CIRCUIT-BREAKERS FOR HOUSEHOLD AND SIMILAR USE Part 3-1: Particular requirements for RCDs with screwlesstype terminals for external copper conductors FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as IEC Publication(s) ). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and nongovernmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62873-3-1 has been prepared by subcommittee 23E: Circuit breakers and similar equipment for household use, of IEC technical committee 23: Electrical accessories. The text of this standard is based on the following documents: FDIS 23E/964/FDIS Report on voting 23E/982/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
4 IEC 62873-3-1:2016 IEC 2016 A list of all parts of the IEC 62873 series published under the general title Residual current operated circuit-breakers for household and similar use can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date.
IEC 62873-3-1:2016 IEC 2016 5 INTRODUCTION This document is part of the series described in the outline document IEC 62873-1.
6 IEC 62873-3-1:2016 IEC 2016 RESIDUAL CURRENT OPERATED CIRCUIT-BREAKERS FOR HOUSEHOLD AND SIMILAR USE Part 3-1: Particular requirements for RCDs with screwlesstype terminals for external copper conductors 1 Scope This part of IEC 62873 applies to RCDs equipped with screwless terminals, for current not exceeding 20 A primarily suitable for connecting unprepared (see 3.5) copper conductors of cross-section up to 4 mm 2. This part of IEC 62873 cannot be used alone but it is intended to be applied together with an RCD product standard (IEC 61008-1 or IEC 61009-1) if an RCD is equipped with screwless terminals. NOTE In AT, CZ, DK, NL, NO, PO, PT and CH, the upper limit of current for use of screwless terminals is 16 A. In this part of IEC 62873, screwless terminals are referred to as terminals and copper conductors are referred to as conductors. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61008-1, Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs) Part 1: General rules IEC 61009-1, Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) Part 1: General rules IEC 62873-2, Residual current operated circuit-breakers for household and similar use Part 2: Residual current devices (RCDs) Vocabulary